1．吸烟对健康有害。2．吸烟易患癌症。3．世界各国政府应采取严厉措施限制吸烟。

Smoking is harmful to the health of people . It not oilly pollutes air，brings about sufferings of other people such as children and nonsmokers，but also causes diseases ofbronchitis，lung cancer，chest cancer and throat catcer． Smoking is associated with cancers．Smoke is a mixture of gases，vaporized chemicals，minlute particles of ash，and other solids．There are also tar and nicotine，which arepowerful poisons．As the smoke is breathed in，all these components from deposits the membranes of the lungs．One point Of concentration where air tube，or bronchus divides．Most lung Cancer begins at this point． World governments should conduct Seriou campaigns against smoking．First，legislative step must be introduced．Second，restrictions on cigarette advertisements must be imposed．Third，public smoking in certain places such as theatres，cinemas，waiting roms at airports and railway stations should be banned．In this way，we may make the smokers feel increasingly uncomfortable about their bad habits．finally，cigarette price should be booste

吸烟对人们有健康有害。吸烟不但污染空气，给他人带来痛苦，譬如给孩子及不吸烟者带来痛苦，而且还引起支气管炎、肺癌、-癌和喉癌。 吸烟与癌有关。烟是一种混合物，其中有气体蒸发的化学物质、微细的烟尘颗粒和一些固态物质。烟里有焦油和尼古丁，这两种东西毒性很大。烟吸人肺里，所有这些成分沉积在肺部的粘膜上。集中的一点就在支气管分叉处。大多数癌症就是由此处开始的。 世界各国政府应发起一场禁烟运动。首先，应采取立法措施。第二，严格限制刊登香烟广告。第三，禁止在某些公众场所吸烟，譬如，不许在剧场、影院、候机厅和候车吸烟。这样，我们就会使那些吸烟者对他们的坏习惯逐渐感到不舒服。最后一点是，应提高香烟价格。